Madden's character was killed off at the "red wedding" in Game of Thrones Season 3. Williams and Harington will return in the show's eighth and final season.

"I'm the serial killer everyone's rooting for," Williams said of Arya in a recent interview with Elle U.K.

"I think until last season, Arya was always killing the baddies. But then we saw her start to use those manipulative powers. It's not until she had that whole dialogue with her sister Sansa in the last season that you realize what she's become, that she's being awful to someone who we love," she added, referring to Sansa Stark (Sophie Turner).

"This final season is going to be incredible," the star teased. "I was in the first episode and I want to be in the last."